Electrical signaling.



P. W. MAXSTADT 68 F. W. MAXSTADT, JR. ELECTRIC SIGNALING.

APPLIUATION FILED MAY 10 1907.

PATENTED MAY 12, 1908.

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FRANCISW. MAXSTADT AND FRANCIS WJMAXSTADT, JR, OF NEW YORK, N. Y.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed May 10, 1907. Serial No. 372,886.

To all whom it may concern:

Be it known that we, FRANOIs W. MAX- STADT and FRANCIS W. MAXSTADT, Jr.,citizens of the United States, and residents of New York, county of NewYork, and State of New York, have invented certain new and useful Imrovements in Electric Signaling, of'which t e following is a full,clear, and exact description.

This invention relates more articularly to alarms in which a bell isinclu ed in the electric circuit.

Heretofore, so far as we are aware, in the ordinary construction of theelectric bell it has been impossible within a reasonable cost to makethe same entirely dust and moisture losion where there is an escape ofgas or the ike. This is caused by the fact that the bells each have amake-and-break contact, and this contact is subject to dust, moistureand corrosion, and is liable tobecome short-circuited by reason of dust,moisture, insects and the like interfering with the make-and-break inthe circuit, and thus prevent the successful operation of the bell,thereby causing constant trouble and annoyance.

The primary object of the invention is to overcome the objections namedand to provide a call or alarm system for apartments,

hotels and the like, in which the bell and the means for operating thesame are thoroughly rotected in suchca way that the bell cannot eshort-circuite'd, and in which everything is dust, fire, corrosion,insect and moisture roof, thereby overcoming many of the ob 1eotionsincident to the use of the ordinary electric bell.

@this specification, and will then be Another ob'ect of the invention isto 1'0- vide means w ereby the bell is non-spar g and maybe used-inmines and powder mills so as to avoidexplosions, and which is lessliable to get out of order than the usual form:

of device employed for the same purpose.

A further object of the invention is to pro vide means which may beemployed in variv ous connections; which is simple n construc-' tion;which ma be manufactured at a comaratively sma cost, and in which theadustment of the bell or bells always remains the same.

The invention will be hereinafter more particularly described withreference to the accompanying drawings, which form a part of pointedFig. 4 is a fragmentary view showin from the base will engage the edgeof t out in the claims at the end of the description.

In the drawings, Figure 1 is a diagrammatic view, showm the electricconnections of one means em odying our .invention.

Fig. 2 is a vertical section of the circuitbreaker, illustrating how thesame may be hermetically sealed. Fig. 3 is a planview with the cover ofthe sealing casing removed.

aslight- 1y different form of armature for t e device shown in Fig. 2.Fig. 5 is a side elevation of the bellor alarm; and Fig. 6 is a planview J of the bell.

In Fig. 1 is shown a plurality of bells or other alarms 10 and a s1n lecircuit-breaker or device 11 included in t e electric circuit .12, andin said circuit is a battery 13 and an inde endent ush button or otherdevice 14 one oreach ell or alarm employed, though it will be understoodthat only one bell may be used with the circuit-breaker, and that thesevarious parts may be arranged in an suitable location, and in anyrelation wit res ect to each other.

he bell 10 has a base plate or bracket 15, and to the base late 15 areheld the electro magnets 16 of t e usual construction, and g which arepreferably inclosed bya suitable water-proo casing or covering and tothe base or bracket 15 are the bin ing posts 17 to which the wires arefastened for connection with the'electric circuit and said ma nets. "Thebase 15 has an upright or stand ard 18, to the upper part of which isheld a yieldin strip or p ate 19 of a resilient nature,

as bar or spring brass, and to this spring,

plate 19 is held the armature 20. This armature 20 comprises two platesheld on opposite sides of the plate or strip 19, andis adapted to beattracted by the magnets1 6 when the latter are energized by theelectric current in the usual way. An arm 21 projects outward from thearmature, and OII-thlS arm is a hammer 22which is arranged adjacent to abell 23, and said bell is held on an arm or upright 24, which projectsat an angle 15, so that as the armature 20 is drawn toward the ma ets,the hammer hi; bell 23 and ring the same, the spring plate 19 serving tonormally force the hammer bell. A wire 25 connects one of the magnets toone of the contacts of the push button 14,

and a second wire 26 leads to the circuit- 22 away from said batteryawire 28 le'ads tothe other contact of the ush button 14, so that whenthe con- .tacts the push button or other device, asawire 26 leadinbreaker 11, and from the circuit-breaker a wire 27 leads to the battery13, and from the other bells 10 has one contact of its push button 14connected with a wire 29, and a wire 30 connecting theother contact withthe coils of the magnets of thebells The other end of the magnetwireconnects with the I to the ma net of the circuitbreaker 11. f eitherof t e push buttons is o erated, the circuit will be completed t oughthe wire 30,-electric bell, wire 31, wire 26, circuit-breaker 11,battery 13, wire 28, and wire 29, so that the bell will ring until thepush button isreleased.

For the purpose of preventing the bells from being short-circuited andto make the bell dust, moisture, and fire proof, we provide acircuit-breaker; in. the circuit which is thoroughly protected. Thiscircuit-breaker 11-has a base 32 which is ada ted to be secured to anysupport, and to t e base is held a bracket 33, to which is secured anelectro magnet 34'. This magnet 34 may be inclosed by suitable material,and has its core 35 arranged adjaoent to an armature 36. This armature36 is weighted, as at 37, to

. make the same sluggish, and this weighting of the armature is of sucha character that 7 the electric bells lO'will all be-attuned so as to vor other work in unison therewith, the weight 37 being such that 'anymovement of the armature 36 will cause a like res onse'from thearmatures 20 of the electric ells 1( This weight 37 may be made as inFig. 2, or the armature may be extended and an adjustable weight 38provided on the armature as shown in Fig. 4. The armature 36 is held toa brass late 39, which is securely held to the u right portion of thebracket 33, and on the p ate or strip 39 is a' contact 40. This contactmoves in the path of an adjustable contact screw 41 which is held to theend of an arm or bracket 42, the latter being supported at one end bythe bracket 33, and suitably insulated from the plate 39. A casing 43 isprovided so as to entirely inclose the circuit-breaker, and this casingmay be of glass, metal or any suitable material, and

. may be provided with means for fasteningit to a suitable support. Thecasing 43 may be of any desired shape, and may be closed and 3. Inelectric signa ssmsi hermetically sealed by a cover 44 'or in any otherdesired way, and said inclosing casing may have the air exhaustedtherefrom, sothat the circuitebreaker may be in vacuum. The casing isprovided with two binding posts 45 and 46, to one of which the wire 26is connected, and to the other the wire 27 which leads to the battery13. From the binding post 46 a wire leads to the electro magnet 34, andfrom the magnet to the late 39. wire leads from the posts 45 to t ebracket or arm 42, so that when the circuit is closed through thebattery 13,'the circuit-breaker or device 11 will cause a make-and-breakin the circuit, and will cause either one of the bells 10' to produce asound according to which push button 14 is operated. By this means alldanger of ex osed sparking is eliminated, and the ma e-andbreak contactsare removed fromthe bell proper and entirely closed within a sealedcasmg, and as there is nomake-and-break contact on the electric. bells,the latter cannot get out of order through being short-circuited, eitherby corrosion, dampness or insects, which would tend to make the bell asordinarily constructed inoperative.

From the foregoing it will be seen that 7 simple and eilicient means isprovided whereby 'one or more bells may be made so that theyare-not-liable to become short-circuited, andin which the bell is dustand moisture proof, and is not liable to become corroded;

and that the bell may be very cheaply made andinstalled and adapted foruses to which the ordinary form of electric bell cannot be employed,

' Having thus described our invention, we claim as new and desire tosecure by-Letters Patent 1. In electric signalin a circuit-breakercomprising a bracket an an electro magnet,

a base supporting the bracket, a spring plate secured to the bracket andcarrying an armature, a weight carried by the armature, an arm held tothe bracket and carrying a contact thereon, a contact movable with thearmature, electric connections for the con- .tacts and electromagnet,and a cylindrical transparent sealing casing entirely inclosing theparts of tile circuit-breaker, and a screwthreaded cap fitting thecasing and servmg to hermetically seal the circuit-breaker withinthecasing.

2. In electric signaling, a bell comprising a bracket having an uprightarm, an angularly disposed arm, electro ma ets carrled by the bracket, aspring plate he d at one end to the upright part of the bracket, anarmature comprising a plurality of plates carried by the spring plate,an arm carryin a harnmer hel body arranged inthe ianth of the arm.

' g, the combination to the armature, and'a be secured to the angularlydisposed arm and having its with aplurality of bells each having anarmature, a hammer and magnets, of a circuitbreaker having an armatureattuned to work Q in unison with the-armature of the electric bells, abattery, an independent push button for each bell, and means whereby oneof the bells will respond to the armature of the circuit-breakeraccording to which push button is operated.

4. In electric signaling, the combination with a plurality of alarmseach having an armature and magnets, of a circuit-breaker attuned towork in unison with the armature of the alarms, a battery, anindependent push button for each alarm, and means whereby one of thealarms will respond to the armature of the circuit-breaker accordingtowhich push button is operated.

5. In electric signaling, the combination with a plurality of bells eachhaving an armature, a hammer and magnets without makeand-break contacts,of a circuit-breaker having an armature and Weighted and attuned to workin unison with the armature of the electric'bells, abatter anindependent ush button, and means w ereby one of the ells will respondto the armature of the circuitbreaker according to which push buttondsoperated. I

This specification si ed and witnessed this 9th a of May A. .1907.

F ANCIS W. MAXSTADT. FRANCIS W. MAXSTADT, JR. Witnesses:

M. TURNER,

L. H. LUNDIN.

